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Balance 2004-2006
Dittrt, František ; Brych, Karel
Since 2004 a tighter general relationship between AVČR and Sdružení obcí Orlicko is created based on a general contract dated from 8th October 2003. Research projects continue by two teams of the AV ČR.
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Socio-environmental characteristics of Králicko microregion
Vaishar, Antonín ; Cetkovský, Stanislav ; Martinát, Stanislav ; Nosková, Helena ; Tošovská, Eva ; Vajdová, Zdenka ; Woitsch, Jiří ; Zapletalová, Jana
The article is focused on relatively complex regional analyses of Králíky microregion. The analyses are focused on natural condition, location, historic evolution and on the present regional and environmental pocitics affecting the regional development. The results of public enquiry focused on perception of microregion are presented, too.
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The mercury load in fishes inhabiting the upper section of the Divoká Orlice and Tichá Orlice rivers
Korunová, Vlasta ; Lusková, Věra ; Lusk, Stanislav
In the boundary section of Divoká Orlice R. the mercury content in the tissues of brown trout did not exceed 0.2 mg.kg-1. WHO risk limit, 1.6 µ mercury per 1 kg human body weight per week, is attained by a person weighing 75 kg and consuming 0.63 kg trout muscular tissue a week. In Divoká Orlice drainage area, the mercury content was determined in roach (Rutilus rutilus) in 1987-1995. In a majority of specimens analysed, the values of mercury contents in their muscular tissue exceeded 0.2 mg.kg-1 (max. 0.683 mg.kg-1). In the upper part of Tichá Orlice R., increased mercury contents were found in brown trout. Below the Králíky profile, the mercury contents varied around 0.50 mg.kg-1 in the muscular tissue, and up to 0.85 mg.kg-1. The mercury loads in the fishes decreased gradually in the downstream direction down to the value around 0.20 mg.kg-1. In the uppermost part of Tichá Orlice R. below the town of Králíky, the risk limit is only 0.24 kg trout meat consumed per week.
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The fish community in the Divoká Orlice River near Kostelec nad Orlicí, and the genetic diversity of the local common gudgeon population
Mendel, Jan ; Lusková, Věra ; Lusk, Stanislav ; Halačka, Karel
The fish community was investigated in two localities (r. km 46.7 and 49.1) on the Divoká Orlice River near Kostelec nad Orlicí . Besides the species characteristic of salmonid waters (Salmo trutta, Thymalus thymallus, Phoxinus phoxinus, Cottus gobio ) there are species typical of a barbel community (Barbus barbus, Leuciscus cephalus, L. leuciscus, Gobio gobio). The occurrence of Lampetra planeri has also been recorded. The abundance attained 4,294 and 6,612 exx..; the weight, 363.8 and 509.7 kg respectively, converted to 1 hectare of water surface. The allozyme analysis of G.gobio has shown that the diversity of the population under study is average, compared to other populations examined in other streams Using the RAPD method, two identification markers have been found for the fish in the population examined. The genetic analysis of mtDNA provided a unique haplotype serving to differentiate the gudgeon population.
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